Patents Assigned to HMR Co., Ltd.
  • Patent number: 8784754
    Abstract: The present invention relates to a method for preparing high-purity aluminum, the method comprising: a mother liquor preparing step for preparing a mother liquor by dissolving and aging ordinary aluminum hydroxide; a refining step for adding pulp to absorb impurities from the prepared mother liquor after the mother liquor preparing step; and an obtaining step for obtaining high-purity alumina by adding a seed into the mother liquor and precipitating a precipitate, and filtering, washing, and recrystallizing the precipitate, and calcining the precipitate. Thus, the present invention enables an environmentally-friendly and low-cost preparation of high-purity alumina.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: July 22, 2014
    Assignee: HMR Co., Ltd.
    Inventor: Jae Hoon Hu